Sandoz Gmbh

Manfred Greve

Helmut A Moser

Reinhard Pedrazzi

Roland Wald

Emil J Moriconi

Metal-free compounds of the formula ##STR1## 1:1 and 1:2 metal complexes thereof, and acid addition salts of metal-free compounds of said formula and 1:1 and 1:2 metal complexes thereof, wherein

Use of metal-free azo _compounds having at least one

Polymers comprising two the more recurring units of formula ##STR1## wherein A.sub.1 is an aromatic bridging group

Polymeric azo compounds containing at least four cationic groups

A compound of formula I ##STR1## in metal-free; 1:1 or 1:2 metal complex form and, when an acid group is present, in free acid or acid addition salt form, in which R.sub.1 is hydrogen or --N.dbd.N--D where D is a diazo component and R, T and B are organic radicals defined in the text.

Azo compounds having at least one 6-hydroxypyrid-2-one coupling

Compounds of the formula ##STR1## wherein each R is independently --N(R.sub.1).sub.2, --N.sup..sym. (R.sub.2).sub.3 A.sup..crclbar. or hydroxy, wherein

Non-azo and azo compounds containing at least one

Metal-free compounds and 1:1 and 1:2 metal complexes of the formula ##STR1## or a 1:2 metal complex of a metal-free compound of said formula and a metallizable azo compound not of said formula, wherein

Sulfo group-free polyazo compounds containing at least two basic

Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, cyano, --COR.sub.4 or --CONR.sub.5 R.sub.6,

Optionally further substituted 5-(2'- or

Compounds of the formula ##STR1## wherein R is chlorine or bromine,

1-(N-alkyl-n-benzyl or substituted

Disclosed are disazo and trisazo dyes free of sulfo groups which contain two 6-hydroxy-4-methyl-3-N-pyridiniumpyridone-2 coupling component radicals, preferably dyes of the formula ##STR1## wherein R is a tetrazo component radical,

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Dornach, Switzerland

Manfred Greve